The penis is an external sexual organ of human and certain animal males. The penis serves as a reproductive organ.
Penis is a complex system consisting of arteries and veins and fleshy part (actually there are no muscles in penis) that contribute to the overall size of penis. When erection occurs a certain hormone gets released from the brain which results in penis being filled with blood. Blood flows into a special spongy penile tissue known as Corpora Cavernosa.
Obviously penis consists of many more parts, but the mentioned Corpora Cavernosa is the crucial part that limits the actual size of penis. Most of the male enhancement techniques are focused on prolonging and/or enlarging this very specific part of penis (except for surgical intervention).
Peyronie’s disease, more usually reffered to as curved (bent) penis, is a quite common (occurs in up to 4% of population) disorder involving the growth of fibrous plaques in the soft tissue of the penis. The fibrosing process occurs in a fibrous envelope surrounding the penile corpora cavernosa causing an abnormal curvature of the penis.
Cavernous Artery: This is the artery responsible for supplying increased amount of blood to Corpora Cavernosa tissue during an erection.
Corona: The ‘crown,’ a ridge of flesh demarcating where the head of the penis and the shaft join.
Corpora Cavernosa: The corpora cavernosa are the two spongy bodies of erectile tissue on either side of the penis which become engorged with blood from arteries in the penis, thus causing erection.
Dorsal Vein: Vein at the top or upper side of the penis.
Glans: The glans is visible in the illustration as the head of the penis. The glans in uncircumcised men is usually covered by the prepuce. The glans is highly sensitive, as is the corona, the ridge of flesh that connects the glans to the shaft of the penis.
Head: Also known as the glans, this is the bulbous tip of the penis.
Urethra: Passageway of the penis, carrying urine from the bladder and semen from the testes to the tip of the penis.
